In conclusion, understanding the basics of 2 wire thermostat wiring is essential for properly installing and configuring a thermostat for a heat-only system. By following the correct wiring procedures and using the provided wiring diagram, you can ensure that your thermostat functions correctly and efficiently.. 2 Wire Thermostat Wiring Basics. Two-wire thermostat wiring is typically used for electric heat and heat pumps, and is the most common type of wiring used for this purpose.. To make the wiring easier, you can use a wiring diagram that will show you the correct configuration for the wires. Heat Only Honeywell Diagrams.
The Honeywell thermostat wiring diagram for a 2-wire setup is straightforward and easy to follow. With only two wires available, you will need to connect the R and W terminals on your thermostat. The R terminal is the power wire, while the W terminal is the heating wire.. 3h/2c: heat pump with electric aux heat. compatible models: th2320 models only. 1: l only connected if heat pump has a fault terminal. 2: some heat pumps use b rather than o for reversing valve. 3: different heat pump models label the auxiliary heat terminal differently than shown. consult heat pump wiring guide.